Moderna and Merck stated their personalized cancer vaccine showed promise in a late trial. Stock prices went up for both companies. Moderna stock jumped 177 percent. Short sellers forfeited an estimated 5.5 billion dollars. The Times said Moderna intends to be a cancer-focused company.
Federal health rules changed. The Trump administration mandated separate MMR shots. South Carolina health officials advised parents to vaccinate kids before school due to a past measles outbreak. Douglas County saw a big drop in childhood immunization program participation. The Washington Post reported on federal vaccine fights and addressed reader questions.